1 // SPDX-License-Identifier: GPL-1.0+ 2 /* 3 * OHCI HCD (Host Controller Driver) for USB. 4 * 5 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> 6 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> 7 * 8 * [ Initialisation is based on Linus' ] 9 * [ uhci code and gregs ohci fragments ] 10 * [ (C) Copyright 1999 Linus Torvalds ] 11 * [ (C) Copyright 1999 Gregory P. Smith] 12 * 13 * PCI Bus Glue 14 * 15 * This file is licenced under the GPL. 16 */ 17 18 #include <linux/io.h> 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/pci.h> 22 #include <linux/usb.h> 23 #include <linux/usb/hcd.h> 24 25 #include "ohci.h" 26 #include "pci-quirks.h" 27 28 #define DRIVER_DESC "OHCI PCI platform driver" 29 30 static const char hcd_name[] = "ohci-pci"; 31 32 33 /*-------------------------------------------------------------------------*/ 34 35 static int broken_suspend(struct usb_hcd *hcd) 36 { 37 device_init_wakeup(&hcd->self.root_hub->dev, 0); 38 return 0; 39 } 40 41 /* AMD 756, for most chips (early revs), corrupts register 42 * values on read ... so enable the vendor workaround. 43 */ 44 static int ohci_quirk_amd756(struct usb_hcd *hcd) 45 { 46 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 47 48 ohci->flags = OHCI_QUIRK_AMD756; 49 ohci_dbg (ohci, "AMD756 erratum 4 workaround\n"); 50 51 /* also erratum 10 (suspend/resume issues) */ 52 return broken_suspend(hcd); 53 } 54 55 /* Apple's OHCI driver has a lot of bizarre workarounds 56 * for this chip. Evidently control and bulk lists 57 * can get confused. (B&W G3 models, and ...) 58 */ 59 static int ohci_quirk_opti(struct usb_hcd *hcd) 60 { 61 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 62 63 ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n"); 64 65 return 0; 66 } 67 68 /* Check for NSC87560. We have to look at the bridge (fn1) to 69 * identify the USB (fn2). This quirk might apply to more or 70 * even all NSC stuff. 71 */ 72 static int ohci_quirk_ns(struct usb_hcd *hcd) 73 { 74 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 75 struct pci_dev *b; 76 77 b = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1)); 78 if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO 79 && b->vendor == PCI_VENDOR_ID_NS) { 80 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 81 82 ohci->flags |= OHCI_QUIRK_SUPERIO; 83 ohci_dbg (ohci, "Using NSC SuperIO setup\n"); 84 } 85 pci_dev_put(b); 86 87 return 0; 88 } 89 90 /* Check for Compaq's ZFMicro chipset, which needs short 91 * delays before control or bulk queues get re-activated 92 * in finish_unlinks() 93 */ 94 static int ohci_quirk_zfmicro(struct usb_hcd *hcd) 95 { 96 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 97 98 ohci->flags |= OHCI_QUIRK_ZFMICRO; 99 ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n"); 100 101 return 0; 102 } 103 104 /* Check for Toshiba SCC OHCI which has big endian registers 105 * and little endian in memory data structures 106 */ 107 static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd) 108 { 109 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 110 111 /* That chip is only present in the southbridge of some 112 * cell based platforms which are supposed to select 113 * CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if 114 * that was the case though. 115 */ 116 #ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO 117 ohci->flags |= OHCI_QUIRK_BE_MMIO; 118 ohci_dbg (ohci, "enabled big endian Toshiba quirk\n"); 119 return 0; 120 #else 121 ohci_err (ohci, "unsupported big endian Toshiba quirk\n"); 122 return -ENXIO; 123 #endif 124 } 125 126 /* Check for NEC chip and apply quirk for allegedly lost interrupts. 127 */ 128 129 static void ohci_quirk_nec_worker(struct work_struct *work) 130 { 131 struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work); 132 int status; 133 134 status = ohci_restart(ohci); 135 if (status != 0) 136 ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n", 137 "ohci_restart", status); 138 } 139 140 static int ohci_quirk_nec(struct usb_hcd *hcd) 141 { 142 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 143 144 ohci->flags |= OHCI_QUIRK_NEC; 145 INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker); 146 ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n"); 147 148 return 0; 149 } 150 151 static int ohci_quirk_amd700(struct usb_hcd *hcd) 152 { 153 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 154 155 if (usb_amd_find_chipset_info()) 156 ohci->flags |= OHCI_QUIRK_AMD_PLL; 157 158 /* SB800 needs pre-fetch fix */ 159 if (usb_amd_prefetch_quirk()) { 160 ohci->flags |= OHCI_QUIRK_AMD_PREFETCH; 161 ohci_dbg(ohci, "enabled AMD prefetch quirk\n"); 162 } 163 164 ohci->flags |= OHCI_QUIRK_GLOBAL_SUSPEND; 165 return 0; 166 } 167 168 static int ohci_quirk_qemu(struct usb_hcd *hcd) 169 { 170 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 171 172 ohci->flags |= OHCI_QUIRK_QEMU; 173 ohci_dbg(ohci, "enabled qemu quirk\n"); 174 return 0; 175 } 176 177 /* List of quirks for OHCI */ 178 static const struct pci_device_id ohci_pci_quirks[] = { 179 { 180 PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c), 181 .driver_data = (unsigned long)ohci_quirk_amd756, 182 }, 183 { 184 PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861), 185 .driver_data = (unsigned long)ohci_quirk_opti, 186 }, 187 { 188 PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID), 189 .driver_data = (unsigned long)ohci_quirk_ns, 190 }, 191 { 192 PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8), 193 .driver_data = (unsigned long)ohci_quirk_zfmicro, 194 }, 195 { 196 PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6), 197 .driver_data = (unsigned long)ohci_quirk_toshiba_scc, 198 }, 199 { 200 PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB), 201 .driver_data = (unsigned long)ohci_quirk_nec, 202 }, 203 { 204 /* Toshiba portege 4000 */ 205 .vendor = PCI_VENDOR_ID_AL, 206 .device = 0x5237, 207 .subvendor = PCI_VENDOR_ID_TOSHIBA, 208 .subdevice = 0x0004, 209 .driver_data = (unsigned long) broken_suspend, 210 }, 211 { 212 PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152), 213 .driver_data = (unsigned long) broken_suspend, 214 }, 215 { 216 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397), 217 .driver_data = (unsigned long)ohci_quirk_amd700, 218 }, 219 { 220 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398), 221 .driver_data = (unsigned long)ohci_quirk_amd700, 222 }, 223 { 224 PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399), 225 .driver_data = (unsigned long)ohci_quirk_amd700, 226 }, 227 { 228 .vendor = PCI_VENDOR_ID_APPLE, 229 .device = 0x003f, 230 .subvendor = PCI_SUBVENDOR_ID_REDHAT_QUMRANET, 231 .subdevice = PCI_SUBDEVICE_ID_QEMU, 232 .driver_data = (unsigned long)ohci_quirk_qemu, 233 }, 234 235 /* FIXME for some of the early AMD 760 southbridges, OHCI 236 * won't work at all. blacklist them. 237 */ 238 239 {}, 240 }; 241 242 static int ohci_pci_reset (struct usb_hcd *hcd) 243 { 244 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 245 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 246 int ret = 0; 247 248 if (hcd->self.controller) { 249 const struct pci_device_id *quirk_id; 250 251 quirk_id = pci_match_id(ohci_pci_quirks, pdev); 252 if (quirk_id != NULL) { 253 int (*quirk)(struct usb_hcd *ohci); 254 quirk = (void *)quirk_id->driver_data; 255 ret = quirk(hcd); 256 } 257 } 258 259 if (ret == 0) 260 ret = ohci_setup(hcd); 261 /* 262 * After ohci setup RWC may not be set for add-in PCI cards. 263 * This transfers PCI PM wakeup capabilities. 264 */ 265 if (device_can_wakeup(&pdev->dev)) 266 ohci->hc_control |= OHCI_CTRL_RWC; 267 return ret; 268 } 269 270 static struct hc_driver __read_mostly ohci_pci_hc_driver; 271 272 static const struct ohci_driver_overrides pci_overrides __initconst = { 273 .product_desc = "OHCI PCI host controller", 274 .reset = ohci_pci_reset, 275 }; 276 277 static const struct pci_device_id pci_ids [] = { { 278 /* handle any USB OHCI controller */ 279 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0), 280 .driver_data = (unsigned long) &ohci_pci_hc_driver, 281 }, { 282 /* The device in the ConneXT I/O hub has no class reg */ 283 PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_OHCI), 284 .driver_data = (unsigned long) &ohci_pci_hc_driver, 285 }, { /* end: all zeroes */ } 286 }; 287 MODULE_DEVICE_TABLE (pci, pci_ids); 288 289 /* pci driver glue; this is a "new style" PCI driver module */ 290 static struct pci_driver ohci_pci_driver = { 291 .name = (char *) hcd_name, 292 .id_table = pci_ids, 293 294 .probe = usb_hcd_pci_probe, 295 .remove = usb_hcd_pci_remove, 296 .shutdown = usb_hcd_pci_shutdown, 297 298 #ifdef CONFIG_PM 299 .driver = { 300 .pm = &usb_hcd_pci_pm_ops 301 }, 302 #endif 303 }; 304 305 static int __init ohci_pci_init(void) 306 { 307 if (usb_disabled()) 308 return -ENODEV; 309 310 pr_info("%s: " DRIVER_DESC "\n", hcd_name); 311 312 ohci_init_driver(&ohci_pci_hc_driver, &pci_overrides); 313 314 #ifdef CONFIG_PM 315 /* Entries for the PCI suspend/resume callbacks are special */ 316 ohci_pci_hc_driver.pci_suspend = ohci_suspend; 317 ohci_pci_hc_driver.pci_resume = ohci_resume; 318 #endif 319 320 return pci_register_driver(&ohci_pci_driver); 321 } 322 module_init(ohci_pci_init); 323 324 static void __exit ohci_pci_cleanup(void) 325 { 326 pci_unregister_driver(&ohci_pci_driver); 327 } 328 module_exit(ohci_pci_cleanup); 329 330 MODULE_DESCRIPTION(DRIVER_DESC); 331 MODULE_LICENSE("GPL"); 332 MODULE_SOFTDEP("pre: ehci_pci"); 333